Fireproof-window stop.



F. F. SMITH.

FIREPROOF WINDOW STOP.

APPLICATION FILED JULY 29. 1914.

Patented Sept. 29. 1914.

1. PHom-Ll THO., WASHING TON. D. c.

FRANK F. SMITH, OF NEWARK, NEW JERSEY.

' rmnrnoon-wmnow sror.

Specification of letters Patent. Patented Sept. 29, 1914:.

Application filed m 29, 1914. Serial No. 853,877.

To all whom it may concern:

Be it known that I, FRANK F. SMITH, a citizen of the United States, anda resident of the city of Newark, in the county of Essex, State of NewJersey, have invented certain new and useful Improvements inFireproof-l/Vindow Stops, of which the fol,- lowing is a specification.

The improvements relate to pivoted fireproof windows, and particularlyto means for limiting the opening movement of such windows to preventthe window from reaching a point where it will balance and remain openinstead of closing by gravity when released. Windows of this characterare commonly pivoted slightly above the middle, so that when pivotedopen to a horizontal position the lower half will, overbalance the upperhalf and cause the window to close automatically. Usually a chain with afusible link is provided, connecting the upper rail, of the sash withthe bottom of the frame by means of a hook or similar device, so thatthe window may be opened and secured open by the chain, and in casev offire will close as soon as releasedby the melting of the fusible link. Anumber of devices for limiting the opening movement of the window,permitting its reversal for cleaning or other purposes and automaticallyreturning to operative position when the'window is closed or partlyclosed have been devised, but the device most extensively used is thatof my Patent, No. 970,656, of September 20, 11910,

in which there is a latch or gravity member and a stop into the path ofwhich the said latch gravitates, so that it will return at all timesautomatically to operative position. In the present device the pawl orlatch is normally in the path of the stop, but when moved therefrom forthe purpose of perm tting reversal of the window will not return tooperative position automatically, but will be returned to such positionpositively through an operative connection between it and the windowsash when the window sash is swung back to its safety position.

The improvements are illustrated in the accompanying drawings, in which-Figure 1 is a front view of a pivoted window with a checking deviceembodying the improvements. Fig. 2 is an enlarged view taken from thesame point as Fig. 1, showing the checking device and adjacent parts,with some of the parts taken away. Fig. 3 is a side view of the partsshown in Fig. 2 with the window closed. Fig. 4 is a similar view showinthe Window reversed after the checking evice hasbeen moved from itsnormal position.

A represents the frame of the window and B the sash, the latter beingmounted in the former by means of the pivotsC extending laterally fromthe boss D of the plate D of the sash and journaled at E in the plate Emounted onthe frame. a r

The underside of the bossD near its extremity forms a stop which isadapted to come in contact with the upper end F of opened to apredetermined extent, and to thus check the opening of the windowat;that point. This position of the window sash is Ellustrated by theoblique dotted lines in 1g. 3. a b

The pawl or-latch F is pivoted to the plate E by means of the pivot Gpassin throu h the latch and into the plate. elow t e pivots of thelatch is a curved extension F which extends downwardly and inwardly andhas its extremity turned to a position approximately parallel with thesash when the sash is closed and the'latch' is in its normal position.The objectjand purposes of this extension F are to bring about the restodescribed. A lug F on the inside of. the

latch cooperates with the stop E projecting from-the plate E to limitthe outward movement of the latch, and thisstop'E also checks the inwardmovement of the latch when it has reached a position in which its upperend F" is in the path of the stop D, and when the window is closed thelatch is prevented from moving outward from the path of the stop by thecontact of the lower extremity of the extension F with the sash. In thismanner the latch is held positively in the path of the stop at alltimes, until the window is opened and it is positively moved from thatpath.

. When it is desired to reverse the window the sash is first swungpartly open and the latch then moved outward so that the stop will passit and permit the sash to assume a reversed position, as shown in Fig.4. The latch will remain in this outward position so long as the windowis reversed, but as soon as the window is closed the sashmoving in thedirection indicated by the arrow in Fig. 4:will come in contact with thelower extremity of the extension F and to its proper position. If nowthe window is opened again it will be checked by con-- tact between thestop D and the upper end B o'fthelatch. It. will .be seen, therefore,that whenever the window is closed the latch is brought back to itsdefensive position in the path of the stop, and that any slightobstruction which might prevent the latch from pivoting freely to itsoriginal position will be overcome. The opposite side of the window maybe provided with a pivot and checking device of the same construction,but the preferred construction consists of the plate D on the sashcarrying the pivotC journaled in the plate E on the frame.

If desired the position and arrangement of the extension F with respectto the sash may be such, or the sash provided with a member soconstructed that the sash in returning to its artl'y closed positionwith the stop immediately above the position usually occupied by theupper end of the latch will cause the said upper end of the latch toreturn to that position and will i thereafter slide past the saidextension.

Such an arrangement is within the scope of the present improvement.

Various. other changes in the details of construction and arrangementmay be made without departing from the scope of the invention. a

What I claim is:

- 1. A device of [the character described, comprising, a. stop and amovable latch, one carried by the frame and the other by the sash,saidparts adapted to come in contact when thesash is opened and to checkthe said opening movement at a predetermined ward its point, said latchhaving a portion normally thus force the latch to. turn on its pivotback in the path of the stop and mounted to move out of the path of saidstop when it is desired toopen the said sash farther, and

means whereby the movement of the sash toclosed position automaticallyforces the latch back into the path of the stop.

2. The combination with a window, comprising a frame and a sashpivotally mounted therein, of a checking device comprising a stop and alatch, one mounted on the sash and the other on the frame and said latchopening thereof, said latch being movable out of alinement with the stopand the relative construction and arrangement of the same with respectto the sash being such that when the sash is closed it automaticallyreturns the latch to the path of the stop.

3. The combination of a stop and a latch one adapted to be mounted onthe frame and the other on a sash of a pivoted window, the latch havinga portion constructed and arranged to come in contact with the stop whenthe sash is swung on its pivot and movable out of the path of the saidstop to permit further pivotal movement of the window, and means wherebythe reverse movement ofthe sash positively restores the latch to itsoriginal position.

Witness my hand this 21st day of July, 1914, at the city of New York, inthe county and State of New York.

FRANK F. SMITH.

Witnesses MARY H. LEWIS, HELEN V. FITZPATRICK.

Copies: of this. patent may be; obtainedfor five cents each, byaddressing the Commissioner of Patents,

Washington, D. G,

